c) A planned flexible loaded area is to be 3 m x 4.5 m and carries a uniformly distributed load of 180 kN/m2. on a bed of saturated normally consolidated clay extended to a great depth. Estimate the elastic settlement below the loaded area. Assume Df = 1.0 m, PI=25% and Undrained strength = 50 kN/m2. d) A steel H-pile is driven by a hammer. The maximum rated hammer energy is 54 kN.m ,the hammer efficiency is 0.8. The number of blows for the last (one inch 25.4 mm) penetration is 10. Estimate the pile capacity using a factor of safety of 5.